WO2016173500A1 - 一种移动终端和用于改善其显示屏emc性能的装置 - Google Patents

一种移动终端和用于改善其显示屏emc性能的装置 Download PDF

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Publication number
WO2016173500A1
WO2016173500A1 PCT/CN2016/080437 CN2016080437W WO2016173500A1 WO 2016173500 A1 WO2016173500 A1 WO 2016173500A1 CN 2016080437 W CN2016080437 W CN 2016080437W WO 2016173500 A1 WO2016173500 A1 WO 2016173500A1
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Prior art keywords
display screen
emc
display
screen fpc
fpc
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PCT/CN2016/080437
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English (en)
French (fr)
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谢进耀
穆青
胡林涛
申清华
李顶
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维沃移动通信有限公司
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Publication of WO2016173500A1 publication Critical patent/WO2016173500A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

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  • the present disclosure relates to the field of mobile terminal technologies, and in particular, to an apparatus and a mobile terminal for improving EMC performance of a display screen of a mobile terminal.
  • the display module In view of the current EMC problem of the display of the mobile terminal, there are mainly two aspects.
  • the display module generates electromagnetic interference exceeding a certain limit on the internal or external environment of the mobile terminal device during normal working, and the performance of the electromagnetic interference on the working signals of the RF transceiver, the touch screen, the antenna, and the like The indicator caused serious interference.
  • the display module has a poor immunity to electromagnetic interference existing in the environment, for example, in the static environment of daily use, probabilistic flower screens, black screens and the like are prone to occur.
  • the scheme 1 passed Add an electrostatic protection device to the display module or the circuit board signal line.
  • Scheme 2 uses the common ground design grounding for the system signal of the display module and the display panel FPC (Flexible Printed Circuit) and the EMC shielding ground signal of the whole machine, supplemented by the static reset of the software display.
  • FPC Flexible Printed Circuit
  • the design scheme of the display EMC in the related art has the following disadvantages: the display EMC performance is poor in consistency and long-term attenuation, the display unit hardware is damaged, the common interference cannot be eliminated, and the high-speed signal of the display interface cannot be completely shielded from other circuits.
  • the module performance index has serious risk of interference, and increases the instability of the mobile terminal system software, affecting the quality and user experience of the mobile terminal product.
  • the technical problem to be solved by the embodiments of the present disclosure is to provide a device for improving the EMC performance of a display screen of a mobile terminal, which is capable of effectively shielding the external factors from the display module.
  • the EMC interference can also effectively shield the EMC interference of the high-speed signal of the protection display module on the working performance of other circuit modules, greatly improve the EMC performance of the display module and the whole machine, and effectively solve the defects in the related technology.
  • an embodiment of the present disclosure further provides a mobile terminal.
  • the present disclosure discloses an apparatus for improving EMC performance of a display screen of a mobile terminal, comprising: a first display screen FPC, and a display driving of the first display screen FPC and a main board and a display screen of the mobile terminal, respectively
  • the second display screen FPC is disposed on the left side of the first display screen FPC, and the second display screen FPC is connected to the signal shielding end of the whole machine EMC shield of the mobile terminal;
  • a third display screen FPC, the third display screen FPC is disposed on the right side of the first display screen FPC, and the third display screen FPC is connected to the signal end of the whole machine EMC shield;
  • the first conductive film the The first conductive film is disposed on the first display screen FPC, the first a display screen FPC and an upper surface of the third display screen FPC, the first conductive film and the second display screen FPC, the third display screen FPC and the mobile terminal Connected to the second conductive film, the second conductive film is disposed on the lower
  • the EMC shielding member covers a projection area of the display driving chip.
  • an extension portion of the EMC shield member is curved around the first display screen FPC, the second display screen FPC, and the third display screen FPC.
  • the EMC shielding member is a sheet conductor or a grid conductor or a comb conductor.
  • the EMC shielding member is a metal film or a copper foil or a conductive cloth.
  • the whole machine EMC shielding ground signal end, the second display screen FPC, the third display screen FPC, the first conductive film, the second conductive The film and the EMC shielding member are respectively connected to the outer casing conductive member of the mobile terminal.
  • the whole machine EMC shielding ground signal end, the second display screen FPC, the third display screen FPC, the first conductive film, the second conductive The film and the EMC shielding member are respectively connected to the middle frame conductive member of the mobile terminal.
  • the first display screen FPC is connected to the main board through a connecting component.
  • the circuit device of the display screen is soldered on the first display screen FPC.
  • the apparatus for improving the EMC performance of the display of the mobile terminal of the embodiment of the present disclosure includes the following advantages: through the first display screen FPC, the second display screen FPC, the first conductive film, the second conductive thin, the first
  • the three display FPC realizes that the system signal is electrically isolated from the EMC shielding signal of the whole machine, and realizes static electricity to the external environment through the second display FPC, the third display FPC, the first conductive film, the second conductive film, and the EMC shielding component.
  • the factors effectively shield the EMC interference of the display module and the high-speed signal of the display module against the EMC interference of the performance of other circuit modules, greatly improving the EMC performance of the display module and the whole machine, and effectively solving the related technologies. Defects in the middle.
  • the present disclosure also discloses a mobile terminal, including: a display screen and a display driving chip connected to the display screen; a main board and a whole machine EMC shielding ground signal; and the improved mobile terminal
  • the device for improving the performance of the display screen wherein the device for improving the EMC performance of the display of the mobile terminal is respectively connected to the main board, the display driving chip and the signal terminal of the whole machine EMC shielding.
  • the mobile terminal of the embodiment of the present disclosure includes the following advantages: the device for improving the EMC performance of the display of the mobile terminal can effectively shield the EMC interference of the external display element from the display module, and can effectively shield the protection.
  • the EMC interference of the high-speed signal of the display module on the working performance of other circuit modules greatly improves the EMC performance of the display module and the whole machine, and effectively solves the defects in the related technologies.
  • FIG. 1 is a structural block diagram of an embodiment of an apparatus for improving EMC performance of a display screen of a mobile terminal according to the present disclosure
  • FIG. 2 is a structural block diagram of a display screen module of an apparatus embodiment for improving EMC performance of a display screen of a mobile terminal according to the present disclosure
  • FIG. 3 is a schematic plan view showing a display module of an embodiment of an apparatus for improving the EMC performance of a display screen of a mobile terminal according to the present disclosure
  • FIG. 4 is an embodiment of an apparatus for improving EMC performance of a display of a mobile terminal of the present disclosure.
  • FIG. 5 is a cross-sectional structural block diagram of a display module when an apparatus embodiment for improving EMC performance of a display of a mobile terminal includes an EMC shielding member and the EMC shielding member is a chip conductor;
  • FIG. 6 is a structural block diagram of an embodiment of a mobile terminal of the present disclosure.
  • One of the core concepts of the embodiments of the present disclosure is to improve the design scheme of the display EMC in the related art, and electrically isolate the system signal and the overall EMC shielding signal to realize the pipeline stereoscopic full-scale EMC of the display module. Shield design.
  • a structural block diagram of an embodiment of an apparatus 1 for improving EMC performance of a display screen of a mobile terminal may specifically include: a first display screen FPC 11 , a second display screen FPC 12 , and a third The display panel FPC 13, the first conductive film 14, the second conductive film 15, and the EMC shield member 16.
  • the first display FPC 11 and the main board 17 and the display screen of the mobile terminal (such as a mobile phone, a notebook computer, a tablet computer, a handheld Internet device, etc.) respectively (for example, a CRT (Cathode Ray Tube) display, an LCD ( Liquid crystal display (liquid crystal display) display, PDP (Plasma Display Panel) display, OLED (Organic Light-Emitting Diode) display, etc.
  • the display driver chip 18 is connected, the first display FPC 11 acquires a system signal from the main board 17, and transmits the system signal to the display driving chip 18.
  • the second display screen FPC 12 is disposed on the left side of the first display screen FPC 11.
  • the third display screen FPC 13 is disposed on the right side of the first display screen FPC 11.
  • the first conductive film 14 is disposed on the upper surfaces of the first display screen FPC 11, the second display screen FPC 12, and the third display screen FPC 13, and the first conductive film 14 is respectively connected to the second display screen FPC 12 and the third display screen FPC. 13 and the whole machine of the mobile terminal
  • the EMC shielding ground signal terminal 19 is connected, and the whole machine EMC shielding ground signal terminal 19 provides the whole machine EMC shielding ground signal.
  • the second conductive film 15 is disposed on the lower surfaces of the first display screen FPC 11, the second display screen FPC 12, and the third display screen FPC 13, and the second conductive film 15 is respectively connected to the second display screen FPC 12 and the third display screen FPC 13 is connected to the whole machine EMC shielding ground signal terminal 19.
  • the EMC shielding member 16 is disposed below the projection area of the display driving chip 18, and the EMC shielding member 16 is respectively connected to the signal shielding terminal 19 of the whole machine EMC shield, the first conductive film 14 and the second conductive film 15.
  • the device 1 for improving the EMC performance of the display screen of the mobile terminal in the embodiment of the present disclosure adopts a design concept of isolating the system signal of the main board 17 from the EMC shielding ground signal of the whole machine in the design of the display screen module, and adopts the first display.
  • the screen FPC 11 is connected to the main board 17 to transmit the system signal of the main board 17, and the second display screen FPC 12 on the left side of the first display screen FPC 11 and the third display screen FPC 13 on the right side are respectively associated with the first conductive film 14 and
  • the second conductive film 15 is connected, and the first conductive film 14 and the second conductive film 15 are respectively connected with the EMC shielding signal of the whole machine, so that the system signal of the display module and the EMC shielding signal of the whole machine are electrically logically separated, so that There is no signal recirculation plane cross effect or parallel effect between the system signal of the main board 17 and the EMC shielding ground signal of the whole machine, thereby avoiding the common ground interference caused by the common ground design grounding of the system signal and the whole machine EMC shielding ground signal in the related art. .
  • the second display screen FPC 12 and the third display screen FPC 13 may be directly connected to the whole machine EMC shielded signal terminal 19 of the mobile terminal, respectively. Further, in one embodiment of the present disclosure, the whole machine EMC shield signal terminal 19, the second display screen FPC 12, the third display screen FPC 13, the first conductive film 14, the second conductive film 15, and the EMC shielding member 16 can be reliably connected to the conductive parts of the housing of the mobile terminal.
  • the second display screen FPC 12, the third display screen FPC 13, the first conductive film 14, the second conductive film 15, the EMC shielding member 16, and the conductive member of the casing constitute a pipeline type stereo full-scale EMC shielding component
  • the whole machine EMC shielding component forms a reliable shielding interval for the EMC interference electromagnetic signal for the external environment and the internal circuit module.
  • the whole machine EMC shielded signal terminal 19 the second display screen FPC 12, the third display screen FPC 13, the first conductive film 14, and the second
  • the conductive film 15 and the EMC shielding member 16 can be respectively connected to the reliable circuit of the middle frame conductive member 111 of the mobile terminal to realize the pipeline stereoscopic all-round EMC shielding function of the whole machine. 2, the EMC shield member 16 and the whole machine EMC shield signal terminal 19 are not shown.
  • the middle frame conductive member 111 is in the figure. The position is the uppermost, and the first conductive film 14 is disposed on the display panel 21.
  • the second display screen FPC 12 and the third display screen FPC 13 are electrically connected to the first conductive film 14 and the second conductive film 15 respectively, and are electrically connected to the signal terminal 19 of the whole machine EMC shield.
  • the second display screen FPC 12, the third display screen FPC 13, the first conductive film 14, the second conductive film 15, the EMC shielding member 16, and the middle frame conductive member 111 constitute a pipeline type stereoscopic all-round
  • the whole machine EMC shielding component, the whole machine EMC shielding component forms a reliable shielding interval for the EMC interference electromagnetic signal for the external environment and the internal circuit module.
  • the first display screen FPC 11 may be connected to the main board 17 through a connecting member 112 for transmitting a system signal of the main board 17.
  • the connecting component 112 can be an FPC connector.
  • the display 2 such as an LCD display
  • the circuit device 113 of the display module may be soldered on the first display FPC 11, the display 2 and the display The driver chip 18 is electrically connected.
  • the EMC shielding member 16 is disposed under the vertical direction of the projection area of the display driving chip 18, and the EMC shielding member 16 is respectively connected to the signal terminal 19 of the whole machine EMC shielding, the first conductive film 14 and the second conductive film 15. It can solve the problem that the electrostatic coupling electric field strength is getting larger and larger due to the thinner and thinner the mobile terminal body.
  • the EMC shield component 16 may cover a projection area of the display driver chip 18. Further, in an embodiment of the present disclosure, according to the conventional structural design features of the current display module, the extension portion of the EMC shielding member 16 may be curved around the first display FPC 11, the second display FPC 12, and the third. Display FPC 13. Specifically, in one embodiment of the present disclosure, the EMC shield member 16 may be a sheet conductor or a grid conductor or a comb conductor or the like. Specific In one embodiment of the present disclosure, the EMC shielding member 16 may be a high electrical conductor such as a metal film or a copper foil or a conductive cloth.
  • the cross-sectional structure of the display module may include the display panel 21 and the window cover.
  • FIG. 5 is a cross-sectional structural block diagram of a display module when the display module for improving the EMC performance of the display of the mobile terminal includes the EMC shielding member 16 and the EMC shielding member 16 is a sheet conductor, wherein the EMC shielding member One end of the 16 is vertically below the projection area of the display driver chip 18, and the extension of one end of the EMC shield member 16 is curved around the display screen FPC 28.
  • the arrows in Figures 4 and 5 show the coupled interference electric field of the display module.
  • the display module and the mobile terminal are subjected to EMC interference, for example, the interference of the coupled interference electric field signal in FIG. 4 and FIG. 5, since the overall potential of the EMC shielding component is consistent, it can be guaranteed
  • the transfer charge caused by the EMC interference is rapidly discharged, thereby realizing the electric field shielding and the EMC interference protection on the upper and lower surfaces of the system signal of the first display FPC 11 and the display device chip 18 and the circuit device 113 of the display module, thereby avoiding
  • the EMC performance of the display is poor and long-term attenuation, the single-chip hardware damage of the display, the common interference cannot be eliminated, and the high-speed signal of the display module cannot be completely shielded from the performance of the other circuit modules.
  • the mobile terminal system has good stability without software participation.
  • the application scenarios and structures of the first conductive film 14 , the second conductive film 15 , and the EMC shielding component 16 can also be applied to a touch screen module including, but not limited to, a mobile terminal, and NFC (Near Field Communication). , short-range wireless communication technology) module, fingerprint identification module, camera module and other circuit modules.
  • a touch screen module including, but not limited to, a mobile terminal, and NFC (Near Field Communication). , short-range wireless communication technology) module, fingerprint identification module, camera module and other circuit modules.
  • the apparatus for improving the EMC performance of the display of the mobile terminal of the embodiment of the present disclosure includes the following advantages: through the first display screen FPC, the second display screen FPC, and the third display screen FPC
  • the system signal is electrically isolated from the EMC shielding signal of the whole machine, and is formed by the second display FPC, the third display FPC, the first conductive film, the second conductive film, the EMC shielding component, and the outer casing conductive component or the middle frame conductive component Pipe-type three-dimensional all-round EMC shielding components, which can effectively shield the EMC interference of the display module against external environmental static factors, and the EMC performance of the high-speed signal of the display module to other circuit modules.
  • the interference is effectively shielded and shielded, which greatly improves the EMC performance of the display module and the whole machine, and effectively solves the defects in the related art.
  • FIG. 6 a structural block diagram of an embodiment of a mobile terminal according to the present disclosure is shown, which may specifically include: a display screen 2, a display driving chip 18, a main board 17, a whole machine EMC shield signal terminal 19, and the above-mentioned for improving mobile Device for terminal display EMC performance.
  • the display driver chip 18 is connected to the display screen 2.
  • the device 1 for improving the EMC performance of the display of the mobile terminal is respectively connected to the main board 17, the display driving chip 18, and the signal shielding terminal 19 of the whole machine EMC shield.
  • the mobile terminal of the embodiment of the present disclosure includes the following advantages: the device for improving the EMC performance of the display screen of the mobile terminal can perform the pipeline stereoscopic all-round EMC shielding on the display screen of the mobile terminal, and can effectively shield the external protection.
  • the EMC interference of the display module can effectively shield the EMC interference of the high-speed signal of the protection display module on the working performance of other circuit modules, greatly improve the EMC performance of the display module and the whole machine, and effectively solve the related technology. Defects in the middle.
  • the device and a mobile terminal for improving the EMC performance of the display of the mobile terminal provided by the present disclosure are described in detail.
  • the principles and implementation manners of the present disclosure are described in the following.
  • the description of the examples is only for helping to understand the method of the present disclosure and its core ideas; at the same time, for those of ordinary skill in the art, according to the idea of the present disclosure, there will be changes in the specific embodiments and application scopes.
  • the description is not to be construed as limiting the disclosure.

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract

本发明提供了一种移动终端和用于改善其显示屏电磁兼容性能（EMC）的装置，包括：第一显示屏柔性电路板（FPC）（11），分别与主板（17）和显示驱动芯片（18）相连；第二显示屏FPC（12），设置在第一显示屏FPC（11）的左侧；第三显示屏FPC（13），设置在第一显示屏FPC（11）的右侧；第一导电薄膜（14），设置在第一至第三显示屏FPC（11-13）的上表面，分别与第二至第三显示屏FPC（12-13）和整机EMC屏蔽地信号端（19）相连；第二导电薄膜（15），设置在第一至第三显示屏FPC（11-13）的下表面，分别与第二至第三显示屏FPC（12-13）和整机EMC屏蔽地信号端（19）相连；EMC屏蔽部件（16），设置在显示驱动芯片（18）的投影区域垂直方向下方，分别与整机EMC屏蔽地信号端（19）、第一至第二导电薄膜（14-15）相连。

Description

一种移动终端和用于改善其显示屏EMC性能的装置
相关申请的交叉引用
本申请主张在2015年4月30日在中国提交的中国专利申请号No.201510222425.1的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及移动终端技术领域，特别是涉及一种用于改善移动终端显示屏EMC性能的装置和一种移动终端。
背景技术
移动终端的智能化发展越来越快，目前常见的触屏式和按键式智能移动终端集成功能越来越多，性能越来越强大，各种智能移动终端已从简单的通话工具变为一个综合信息处理平台和通讯数据中心，成为人们日常生活中十分重要的移动办公娱乐设备。随着电子技术的不断发展，移动终端的电路设计和系统功能变得越来越复杂，厚度变得越来越轻薄，显示屏尺寸越来越大，因而带来越来越多EMC(Electro Magnetic Compatibility，电磁兼容性)问题。
为了使得移动终端产品能够通过行业EMC相关认证，以及实现用户日常使用环境电磁兼容性，需要对电路板及移动终端进行EMC的电路和结构设计。
鉴于目前移动终端的显示屏EMC问题主要有以下两方面。一方面是显示屏模组在正常工作过程中对移动终端设备内部或外部所在环境产生超过一定限值的电磁干扰，该电磁干扰对射频收发机、触摸屏、天线等电路模块的工作信号灵敏度等性能指标产生严重干扰。另一方面是显示屏模组对所在环境中存在的电磁干扰的抗扰度较差，例如在日常使用的静电环境中容易出现概率性花屏、黑屏等工作异常现象。
相关技术中提供了以下两种显示屏EMC的设计方案。其中，方案1通过 在显示屏模组或者主板电路模块信号线路上增加静电保护器件。方案2对显示屏模组及显示屏FPC(Flexible Printed Circuit，柔性电路板)的系统信号和整机EMC屏蔽地信号采用共地端设计接地，辅以软件显示屏静电复位的方案。
相关技术中的显示屏EMC的设计方案存在以下缺点：显示屏EMC性能一致性差且长期衰减，显示屏单体硬件损坏，共地干扰无法消除，以及无法全方位屏蔽显示屏接口高速信号对其它电路模块工作性能指标产生严重干扰的风险，同时增加了移动终端系统软件的不稳定性，影响移了动终端产品品质和用户体验。
因此，目前需要本领域技术人员迫切解决的一个技术问题就是：对相关技术中的显示屏EMC的设计方案进行改进，以在一定程度上消除上述缺点。
发明内容
本公开实施例所要解决的技术问题是提供一种用于改善移动终端显示屏EMC性能的装置，该用于改善移动终端显示屏EMC性能的装置，不仅可以有效屏蔽防护外部因素对显示屏模组的EMC干扰，还可以有效屏蔽防护显示屏模组高速信号对其它电路模块工作性能的EMC干扰，大幅提高了显示屏模组以及整机的EMC性能，有效解决了相关技术中存在的缺陷。
相应的，本公开实施例还提供了一种移动终端。
为了解决上述问题，本公开揭示了一种用于改善移动终端显示屏EMC性能的装置，包括：第一显示屏FPC，所述第一显示屏FPC分别与移动终端的主板和显示屏的显示驱动芯片相连；第二显示屏FPC，所述第二显示屏FPC设置在所述第一显示屏FPC的左侧，所述第二显示屏FPC与移动终端的整机EMC屏蔽地信号端相连；第三显示屏FPC，所述第三显示屏FPC设置在所述第一显示屏FPC的右侧，所述第三显示屏FPC与所述整机EMC屏蔽地信号端相连；第一导电薄膜，所述第一导电薄膜设置在所述第一显示屏FPC、所述第 二显示屏FPC和所述第三显示屏FPC的上表面，所述第一导电薄膜分别与所述第二显示屏FPC、所述第三显示屏FPC和移动终端的整机EMC屏蔽地信号端相连；第二导电薄膜，所述第二导电薄膜设置在所述第一显示屏FPC、所述第二显示屏FPC和所述第三显示屏FPC的下表面，所述第二导电薄膜分别与所述第二显示屏FPC、所述第三显示屏FPC和所述整机EMC屏蔽地信号端相连；以及EMC屏蔽部件，所述EMC屏蔽部件设置在所述显示驱动芯片的投影区域垂直方向下方，所述EMC屏蔽部件分别与所述整机EMC屏蔽地信号端、所述第一导电薄膜和所述第二导电薄膜相连。
具体地，在本公开的一个实施例中，所述EMC屏蔽部件覆盖所述显示驱动芯片的投影区域。
进一步地，在本公开的一个实施例中，所述EMC屏蔽部件的外延部分弯曲环绕所述第一显示屏FPC、所述第二显示屏FPC和所述第三显示屏FPC。
具体地，在本公开的一个实施例中，所述EMC屏蔽部件为片状导体或网格状导体或梳状导体。
具体地，在本公开的一个实施例中，所述EMC屏蔽部件为金属膜或铜箔或导电布。
进一步地，在本公开的一个实施例中，所述整机EMC屏蔽地信号端、所述第二显示屏FPC、所述第三显示屏FPC、所述第一导电薄膜、所述第二导电薄膜和所述EMC屏蔽部件分别与移动终端的外壳导电部件相连。
进一步地，在本公开的一个实施例中，所述整机EMC屏蔽地信号端、所述第二显示屏FPC、所述第三显示屏FPC、所述第一导电薄膜、所述第二导电薄膜和所述EMC屏蔽部件分别与移动终端的中框导电部件相连。
进一步地，在本公开的一个实施例中，所述第一显示屏FPC通过连接部件与所述主板相连。
进一步地，在本公开的一个实施例中，所述显示屏的电路器件焊接在所述第一显示屏FPC上。
与相关技术相比，本公开实施例的用于改善移动终端显示屏EMC性能的装置包括以下优点：通过第一显示屏FPC、第二显示屏FPC、第一导电薄膜、第二导电薄、第三显示屏FPC实现系统信号和整机EMC屏蔽信号相电气隔离，并通过第二显示屏FPC、第三显示屏FPC、第一导电薄膜、第二导电薄膜、EMC屏蔽部件，实现对外部环境静电等因素对显示屏模组的EMC干扰和显示屏模组高速信号对其它电路模块工作性能的EMC干扰进行有效屏蔽防护，大幅提高了显示屏模组以及整机的EMC性能，有效解决了相关技术中存在的缺陷。
为了解决上述问题，本公开还公开了一种移动终端，包括：显示屏和与所述显示屏相连的显示驱动芯片；主板和整机EMC屏蔽地信号端；以及所述的用于改善移动终端显示屏EMC性能的装置，所述用于改善移动终端显示屏EMC性能的装置分别与所述主板、所述显示驱动芯片和所述整机EMC屏蔽地信号端相连。
与相关技术相比，本公开实施例的移动终端包括以下优点：通过用于改善移动终端显示屏EMC性能的装置不仅可以有效屏蔽防护外部因素对显示屏模组的EMC干扰，还可以有效屏蔽防护显示屏模组高速信号对其它电路模块工作性能的EMC干扰，大幅提高了显示屏模组以及整机的EMC性能，有效解决了相关技术中存在的缺陷。
附图说明
图1是本公开的一种用于改善移动终端显示屏EMC性能的装置实施例的结构框图；
图2是本公开的一种用于改善移动终端显示屏EMC性能的装置实施例的显示屏模组的结构框图；
图3是本公开的一种用于改善移动终端显示屏EMC性能的装置实施例的显示屏模组的平面结构示意图；
图4是本公开的一种用于改善移动终端显示屏EMC性能的装置实施例不 包括EMC屏蔽部件时，显示屏模组的剖面结构框图；
图5是本公开的一种用于改善移动终端显示屏EMC性能的装置实施例包括EMC屏蔽部件且EMC屏蔽部件为片状导体时，显示屏模组的剖面结构框图；以及
图6是本公开的一种移动终端实施例的结构框图。
具体实施方式
为使本公开的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本公开作进一步详细的说明。
本公开实施例的核心构思之一在于，对相关技术中的显示屏EMC的设计方案进行改进，对系统信号和整机EMC屏蔽信号进行电气隔离，实现显示屏模组的管道式立体全方位EMC屏蔽设计。
参照图1，示出了本公开的一种用于改善移动终端显示屏EMC性能的装置1实施例的结构框图，具体可以包括：第一显示屏FPC 11、第二显示屏FPC 12、第三显示屏FPC 13、第一导电薄膜14、第二导电薄膜15以及EMC屏蔽部件16。
其中，第一显示屏FPC 11分别与移动终端(例如手机、笔记本电脑、平板电脑和掌上上网设备等)的主板17和显示屏(例如CRT(Cathode Ray Tube，阴极射线管)显示屏、LCD(Liquid Crystal Display，液晶显示器)显示屏、PDP(Plasma Display Panel，等离子显示器)显示屏、OLED(Organic Light-Emitting Diode，有机发光二极管)显示屏等)的显示驱动芯片18相连，第一显示屏FPC 11从主板17获取系统信号，并将系统信号传输至显示驱动芯片18。第二显示屏FPC 12设置在第一显示屏FPC 11的左侧。第三显示屏FPC 13设置在第一显示屏FPC 11的右侧。第一导电薄膜14设置在第一显示屏FPC 11、第二显示屏FPC 12和第三显示屏FPC 13的上表面，第一导电薄膜14分别与第二显示屏FPC 12、第三显示屏FPC 13和移动终端的整机 EMC屏蔽地信号端19相连，整机EMC屏蔽地信号端19提供整机EMC屏蔽地信号。第二导电薄膜15设置在第一显示屏FPC 11、第二显示屏FPC 12和第三显示屏FPC 13的下表面，第二导电薄膜15分别与第二显示屏FPC 12、第三显示屏FPC 13和整机EMC屏蔽地信号端19相连。EMC屏蔽部件16设置在显示驱动芯片18的投影区域垂直方向下方，EMC屏蔽部件16分别与整机EMC屏蔽地信号端19、第一导电薄膜14和第二导电薄膜15相连。
本公开实施例的用于改善移动终端显示屏EMC性能的装置1，在显示屏模组设计上，采用将主板17的系统信号和整机EMC屏蔽地信号相隔离的设计理念，通过第一显示屏FPC 11与主板17相连以传输主板17的系统信号，和通过第一显示屏FPC 11左侧的第二显示屏FPC 12和右侧的第三显示屏FPC 13分别与第一导电薄膜14和第二导电薄膜15相连，第一导电薄膜14和第二导电薄膜15分别与整机EMC屏蔽地信号相连，实现显示屏模组的系统信号与整机EMC屏蔽地信号在电气逻辑上分隔，使得主板17的系统信号与整机EMC屏蔽地信号之间无信号回流平面交叉效应或者平行效应，从而避免了相关技术中系统信号和整机EMC屏蔽地信号采用共地端设计接地引起的共地干扰。
在本公开的一个实施例中，第二显示屏FPC 12和第三显示屏FPC 13可以分别与移动终端的整机EMC屏蔽地信号端19直接相连。进一步地，在本公开的一个实施例中，整机EMC屏蔽地信号端19、第二显示屏FPC 12、第三显示屏FPC 13、第一导电薄膜14、第二导电薄膜15和EMC屏蔽部件16可以分别与移动终端的外壳导电部件进行可靠电路相连。其中，第二显示屏FPC 12、第三显示屏FPC 13、第一导电薄膜14、第二导电薄膜15、EMC屏蔽部件16以及外壳导电部件构成了一个管道式立体全方位的整机EMC屏蔽组件，该整机EMC屏蔽组件为外部环境和内部电路模块形成EMC干扰电磁信号的可靠屏蔽区间。
进一步地，在本公开的另一个实施例中，参照图2，整机EMC屏蔽地信号端19、第二显示屏FPC 12、第三显示屏FPC 13、第一导电薄膜14、第二 导电薄膜15和EMC屏蔽部件16可以分别与移动终端的中框导电部件111进行可靠电路相连以实现管道式立体全方位的整机EMC屏蔽功能。其中，图2中EMC屏蔽部件16和整机EMC屏蔽地信号端19未示出，如图2所示，若设定显示面板21在图中位置为最下面，中框导电部件111在图中位置为最上面，则第一导电薄膜14设置在显示面板21上面。第二显示屏FPC 12、第三显示屏FPC 13分别跟第一导电薄膜14、第二导电薄膜15进行电路连接，并和整机EMC屏蔽地信号端19进行电路连接。需要说明的是，第二显示屏FPC 12、第三显示屏FPC 13、第一导电薄膜14、第二导电薄膜15、EMC屏蔽部件16以及中框导电部件111构成了一个管道式立体全方位的整机EMC屏蔽组件，该整机EMC屏蔽组件为外部环境和内部电路模块形成EMC干扰电磁信号的可靠屏蔽区间。
在本公开的一个实施例中，参照图3，第一显示屏FPC 11可以通过连接部件112与主板17相连，连接部件112用于传输主板17的系统信号。具体地，在本公开的一个实施例中，连接部件112可以为FPC连接器。进一步地，在本公开的一个实施例中，参照图3，显示屏2(例如LCD显示屏)或显示屏模组的电路器件113可以焊接在第一显示屏FPC 11上，显示屏2与显示驱动芯片18进行电路连接。
需要说明的是，将EMC屏蔽部件16设置在显示驱动芯片18的投影区域垂直方向下方，EMC屏蔽部件16分别与整机EMC屏蔽地信号端19、第一导电薄膜14和第二导电薄膜15相连，可以解决目前移动终端机身厚度越来越薄引起的静电耦合电场强度越来越大的问题。
在本公开的一个实施例中，EMC屏蔽部件16可以覆盖显示驱动芯片18的投影区域。进一步地，在本公开的一个实施例中，根据当前显示屏模组的常规结构设计特点，EMC屏蔽部件16的外延部分可以弯曲环绕第一显示屏FPC 11、第二显示屏FPC 12和第三显示屏FPC 13。具体地，在本公开的一个实施例中，EMC屏蔽部件16可以为片状导体或网格状导体或梳状导体等。具体 地，在本公开的一个实施例中，EMC屏蔽部件16可以为金属膜或铜箔或导电布等高导电体。
如图4所示，在本公开的一个实施例中，当用于改善移动终端显示屏EMC性能的装置不包括EMC屏蔽部件16时，显示屏模组的剖面结构可以包括显示面板21、视窗盖板22、粘合部件23、偏光片24、上玻璃25、显示驱动芯片18、第一缓冲部件26、第二缓冲部件27、显示屏FPC 28和触摸按键FPC 29，其中，显示屏FPC 28由第一显示屏FPC 11、第二显示屏FPC 12、第三显示屏FPC 13组成。图5是当用于改善移动终端显示屏EMC性能的装置的显示屏模组包括EMC屏蔽部件16且EMC屏蔽部件16为片状导体时，显示屏模组的剖面结构框图，其中，EMC屏蔽部件16的一端在显示驱动芯片18的投影区域垂直方向下方，EMC屏蔽部件16一端的外延部分弯曲环绕显示屏FPC 28。其中，图4和图5中箭头所示为显示屏模组的耦合干扰电场。
在本公开的一个具体实施例中，当显示屏模组及移动终端受到EMC干扰时，例如图4和图5中耦合干扰电场信号的干扰，由于EMC屏蔽组件整体电势保持一致，因此，可以保证EMC干扰引起的转移电荷快速泻放，进而实现对第一显示屏FPC 11上系统信号和显示驱动芯片18及显示屏模组的电路器件113上下表面全方位的电场屏蔽及EMC干扰防护，避免了显示屏的EMC性能一致性差且长期衰减、显示屏的单体硬件损坏、共地干扰无法消除和无法立体全方位屏蔽显示屏模组高速信号对其它电路模块工作性能指标产生严重干扰的问题，且无需软件参与，移动终端系统稳定性好。
需要说明的是，对于上述第一导电薄膜14、第二导电薄膜15和EMC屏蔽部件16的应用场景和结构形式，还可以应用于包括但不限于移动终端的触摸屏模组、NFC(Near Field Communication，近距离无线通讯技术)模组、指纹识别模组、摄像头模组等电路模块中。
与相关技术相比，本公开实施例的用于改善移动终端显示屏EMC性能的装置包括以下优点：通过第一显示屏FPC、第二显示屏FPC、第三显示屏FPC 实现系统信号和整机EMC屏蔽信号相电气隔离，并通过第二显示屏FPC、第三显示屏FPC、第一导电薄膜、第二导电薄膜、EMC屏蔽部件以及外壳导电部件或中框导电部件构成管道式立体全方位的整机EMC屏蔽组件，从而能够实现对外部环境静电等因素对显示屏模组的EMC干扰进行有效屏蔽防护，和对显示屏模组高速信号对其它电路模块工作性能的EMC干扰进行有效屏蔽防护，大幅提高了显示屏模组以及整机的EMC性能，有效解决了相关技术中存在的缺陷。
参照图6，示出了本公开一种移动终端实施例的结构框图，具体可以包括：显示屏2、显示驱动芯片18、主板17、整机EMC屏蔽地信号端19以及上述的用于改善移动终端显示屏EMC性能的装置1。其中，显示驱动芯片18与显示屏2相连。用于改善移动终端显示屏EMC性能的装置1分别与主板17、显示驱动芯片18和整机EMC屏蔽地信号端19相连。
与相关技术相比，本公开实施例的移动终端包括以下优点：通过用于改善移动终端显示屏EMC性能的装置能够对移动终端显示屏进行管道式立体全方位EMC屏蔽，不仅可以有效屏蔽防护外部因素对显示屏模组的EMC干扰，还可以有效屏蔽防护显示屏模组高速信号对其它电路模块工作性能的EMC干扰，大幅提高了显示屏模组以及整机的EMC性能，有效解决了相关技术中存在的缺陷。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
尽管已描述了本公开实施例的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例做出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开实施例范围的所有变更和修改。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语 仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
以上对本公开所提供的一种用于改善移动终端显示屏EMC性能的装置和一种移动终端，进行了详细介绍，本文中应用了具体个例对本公开的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本公开的方法及其核心思想；同时，对于本领域的一般技术人员，依据本公开的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本公开的限制。

Claims (10)

  1. 一种用于改善移动终端显示屏EMC性能的装置，包括：
    第一显示屏FPC，所述第一显示屏FPC分别与移动终端的主板和显示屏的显示驱动芯片相连；
    第二显示屏FPC，所述第二显示屏FPC设置在所述第一显示屏FPC的左侧；
    第三显示屏FPC，所述第三显示屏FPC设置在所述第一显示屏FPC的右侧；
    第一导电薄膜，所述第一导电薄膜设置在所述第一显示屏FPC、所述第二显示屏FPC和所述第三显示屏FPC的上表面，所述第一导电薄膜分别与所述第二显示屏FPC、所述第三显示屏FPC和移动终端的整机EMC屏蔽地信号端相连；
    第二导电薄膜，所述第二导电薄膜设置在所述第一显示屏FPC、所述第二显示屏FPC和所述第三显示屏FPC的下表面，所述第二导电薄膜分别与所述第二显示屏FPC、所述第三显示屏FPC和所述整机EMC屏蔽地信号端相连；以及
    EMC屏蔽部件，所述EMC屏蔽部件设置在所述显示驱动芯片的投影区域垂直方向下方，所述EMC屏蔽部件分别与所述整机EMC屏蔽地信号端、所述第一导电薄膜和所述第二导电薄膜相连。
  2. 根据权利要求1所述的装置，其中，所述EMC屏蔽部件覆盖所述显示驱动芯片的投影区域。
  3. 根据权利要求1所述的装置，其中，所述EMC屏蔽部件的外延部分弯曲环绕所述第一显示屏FPC、所述第二显示屏FPC和所述第三显示屏FPC。
  4. 根据权利要求1-3中任一项所述的装置，其中，所述EMC屏蔽部件为片状导体或网格状导体或梳状导体。
  5. 根据权利要求4所述的装置，其中，所述EMC屏蔽部件为金属膜或铜箔或导电布。
  6. 根据权利要求1所述的装置，其中，所述整机EMC屏蔽地信号端、所述第二显示屏FPC、所述第三显示屏FPC、所述第一导电薄膜、所述第二导电薄膜和所述EMC屏蔽部件分别与移动终端的外壳导电部件相连。
  7. 根据权利要求1所述的装置，其中，所述整机EMC屏蔽地信号端、所述第二显示屏FPC、所述第三显示屏FPC、所述第一导电薄膜、所述第二导电薄膜和所述EMC屏蔽部件分别与移动终端的中框导电部件相连。
  8. 根据权利要求1所述的装置，其中，所述第一显示屏FPC通过连接部件与所述主板相连。
  9. 根据权利要求1所述的装置，其中，所述显示屏的电路器件焊接在所述第一显示屏FPC上。
  10. 一种移动终端，包括：
    显示屏和与所述显示屏相连的显示驱动芯片；
    主板和整机EMC屏蔽地信号端；以及
    如权利要求1-9中任一项所述的用于改善移动终端显示屏EMC性能的装置，所述用于改善移动终端显示屏EMC性能的装置分别与所述主板、所述显示驱动芯片和所述整机EMC屏蔽地信号端相连。
PCT/CN2016/080437 2015-04-30 2016-04-28 一种移动终端和用于改善其显示屏emc性能的装置 WO2016173500A1 (zh)

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